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Re: [dm-devel] Is there a way to see updated contents of a DM target's underlying device while the DM target is in use?

From: Alasdair G Kergon <agk redhat com>
To: "Riches Jr, RobertX M" <robertx m riches jr intel com>
Cc: "Dm-Devel Mailing List Send-To Address \(dm-devel redhat com\)" <dm-devel redhat com>
Subject: Re: [dm-devel] Is there a way to see updated contents of a DM target's underlying device while the DM target is in use?
Date: Thu, 1 Jul 2010 01:51:57 +0100

On Wed, Jun 30, 2010 at 04:53:23PM -0700, Riches Jr, RobertX M wrote:
> I didn't see any queues or caches in dm-linear that would need to be flushed.
 
It's your test script that is not behaving as you expect:)

Add conv=odirect to dd

Add blockdev --flushbufs after other writes.

Alasdair

Follow-Ups:
- Re: [dm-devel] Is there a way to see updated contents of a DM target's underlying device while the DM target is in use?
  - From: Alasdair G Kergon
- Re: [dm-devel] Is there a way to see updated contents of a DM target's underlying device while the DM target is in use?
  - From: Malahal Naineni
- Re: [dm-devel] Is there a way to see updated contents of a DM target's underlying device while the DM target is in use?
  - From: Riches Jr, RobertX M

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